tools/flexcat/src/vasprintf.c

   1 /*
   2  * $Id$
   3  *
   4  * Copyright (C) 1993-1999 by Jochen Wiedmann and Marcin Orlowski
   5  * Copyright (C) 2002-2010 by the FlexCat Open Source Team
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or (at
  10  * your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26
  27 #ifndef VA_COPY
  28 #if defined(__MORPHOS__)
  29 #define VA_COPY(dest, src) __va_copy(dest, src)
  30 #elif defined(__AROS__)
  31 #define VA_COPY(dest, src) va_copy(dest, src)
  32 #else
  33 #define VA_COPY(dest, src) (dest) = (src)
  34 #endif
  35 #endif
  36
  37 int vasprintf(char **ptr, const char * format, va_list ap)
  38 {
  39   int ret;
  40   va_list ap2;
  41
  42   *ptr = NULL;
  43
  44   VA_COPY(ap2, ap);
  45   ret = vsnprintf(NULL, 0, format, ap2);
  46   if(ret <= 0)
  47     return ret;
  48
  49   *ptr = (char *)malloc(ret+1);
  50   if(*ptr == NULL)
  51     return -1;
  52
  53   VA_COPY(ap2, ap);
  54   ret = vsnprintf(*ptr, ret+1, format, ap2);
  55
  56   return ret;
  57 }